Walmart offers the refurbished Vizio 55" 4K 2160p LED-Backlit LCD Ultra HD Smart TV, model no. M55-C2, for $579.99 with free shipping. That's $50 under our refurb mention from two weeks ago and the lowest total price we've seen for this TV. (It's a current price low for a refurb by $170.) It features a 3840x2160 resolution (four times that of 1080p), 120Hz refresh rate, WiFi, Internet Apps (Netflix, Hulu Plus, Amazon Video, more), and five HDMI ports.

No warranty information is provided.